This short extract from an April 2013 NSA document describes a “verbal agreement” between GCSB and NSA to proceed with the FROSTBITE / BASILHAYDEN project to infiltrate a Chinese diplomatic data link: see the New Zealand Herald article Leaked papers reveal NZ plan to spy on China for US, 19 April 2015.

﻿(TS//SI//NF) New Zealand: GCSB has identified an MFA data link between the
Chinese Consulate and Chinese Visa Office in Auckland. NSA and GCSB have
verbally agreed to move forward with a coopera...

This monthly report from the NSA’s Special US Liaison Officer in Wellington outlines progress on FROSTBITE (BASILHAYDEN) – a project to infiltrate the Chinese diplomatic computer network: see the New Zealand Herald article Leaked papers reveal NZ plan to spy on China for US, 19 April 2015.